/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.wicketskunkworks.pagetabs.brill;

import java.util.List;

import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.markup.html.AjaxFallbackLink;
import org.apache.wicket.markup.html.WebMarkupContainer;

/**
 * Ajaxified version of the paged tabbed panel. Uses AjaxFallbackLink instead of
 * regular wicket links so it can update itself inplace.
 * 
 * @author Igor Vaynberg (ivaynberg)
 * 
 */
public class AjaxPageTabbedPanel extends PageTabbedPanel {
	private static final long serialVersionUID = 1L;

	/**
	 * Constructor
	 * 
	 * @param id
	 * @param tabs
	 */
	public AjaxPageTabbedPanel(String id, List<IPageTab> tabs) {
		super(id, tabs);
		setOutputMarkupId(true);

		setVersioned(false);
	}

	@Override
	protected WebMarkupContainer newLink(String linkId, final int index) {
		return new AjaxFallbackLink(linkId) {

			private static final long serialVersionUID = 1L;

			@Override
			public void onClick(AjaxRequestTarget target) {
				setSelectedTab(index);
				if (target != null) {
					target.addComponent(AjaxPageTabbedPanel.this);
				}
				onAjaxUpdate(target);
			}

		};
	}

	/**
	 * A template method that lets users add additional behavior when ajax
	 * update occurs. This method is called after the current tab has been set
	 * so access to it can be obtained via {@link #getSelectedTab()}.
	 * <p>
	 * <strong>Note</strong> Since an {@link AjaxFallbackLink} is used to back
	 * the ajax update the <code>target</code> argument can be null when the
	 * client browser does not support ajax and the fallback mode is used. See
	 * {@link AjaxFallbackLink} for details.
	 * 
	 * @param target
	 *            ajax target used to update this component
	 */
	protected void onAjaxUpdate(AjaxRequestTarget target) {
	}

}
